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US 12,120,447 B2Granted
Photoelectric conversion device, imaging system, moving body, and stackable semiconductor device
AssigneeCanon Kabushiki Kaisha
InventorsYu Arishima, Masahiro Kobayashi, Koichiro Iwata, Fumihiro Inui
Life of this patent
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Abstract
A unit circuit includes a photoelectric conversion element, an output transistor including an input node and configured to output a signal based on a charge from the photoelectric conversion element, a reset transistor, and a first transistor connected to the input node and configured to change a capacitance of the input node. A first control signal supplied to a gate electrode of the first transistor has at least three types of voltages.
Claims17
A photoelectric conversion device comprising a unit circuit including:
- a photoelectric conversion element;
- an output transistor including an input node and configured to output a signal based on a charge from the photoelectric conversion element;
- a transfer transistor configured to transfer the charge from the photoelectric conversion element to the input node;
- a reset transistor configured to set a potential of the input node to a predetermined potential;
- and
- a first transistor including a gate electrode and a plurality of main electrodes, and configured to change a capacitance of the input node, the plurality of main electrodes including a first electrode and a second electrode, the first electrode being connected to the input node without passing through the second electrode, and the second electrode being connected to the transfer transistor through the first electrode,
- wherein a first control signal supplied to a gate electrode of the first transistor has at least a first voltage at which the first transistor turns ON, a second voltage at which the first transistor turns OFF, and a third voltage having a value between values of the first and second voltages, and
- wherein a second control signal supplied to a gate electrode of the reset transistor has at least a fifth voltage at which the reset transistor turns ON, a sixth voltage at which the reset transistor turns OFF, and a seventh voltage having a value between values of the fifth and sixth voltages.
5 more elements
A photoelectric conversion device comprising a unit circuit including:
- a photoelectric conversion element;
- an output transistor including an input node and configured to output a signal based on a charge from the photoelectric conversion element;
- a reset transistor configured to set a potential of the input node to a predetermined node;
- and
- a first transistor connected to the input node and configured to change a capacitance of the input node,
- wherein a control signal supplied to a gate electrode of the reset transistor has at least a voltage at which the reset transistor turns ON and a voltage at which the reset transistor turns OFF,
- wherein a control signal supplied to a gate electrode of the first transistor has at least a voltage at which the first transistor turns ON and a voltage at which the first transistor turns OFF, and
- wherein the voltage at which the reset transistor turns OFF is different from the voltage at which the first transistor turns OFF.
5 more elements
Dependencies are inferred from the claim text.